Inspection Procedure O-20
Sunroof switch:- The "CLOSE/TILT-DOWN" switch signal is not sent to the ETACS-ECU.
- The "TILT-UP" switch signal is not sent to the ETACS-ECU. The "OPEN" switch signal is not sent to the ETACS-ECU.
Sunroof Switch Input Circuit And SWS Communication Circuit:
Connectors:
CIRCUIT OPERATION
The ETACS-ECU receives a signal from the sunroof switch through the sunroof motor assembly, and sends the input signal to the data link connector.
TECHNICAL DESCRIPTION (COMMENT)
If the SWS communication line between the sunroof motor assembly and the ETACS-ECU is defective, the sunroof switch input signal can not be checked even if the sunroof is normal.
TROUBLESHOOTING HINTS
- Malfunction of the sunroof switch
- Malfunction of the sunroof motor assembly
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors
DIAGNOSIS
Required Special Tools:
MB991223: Test Harness Set
MB991502: Scan Tool (MUT-II)
MB991529: Diagnostic Trouble Code Check Harness
STEP 1. Check the sunroof operation.
If the sunroof does not work at all, solve the problem first. Refer to Inspection Procedure F-1.
If the sunroof works normally, go to Step 2.
STEP 2. Check trouble symptom.
If the sunroof switch signal can be checked at any of the switch positions, go to Step 3.
If the sunroof switch signal can not be checked at any of the switch positions, go to Step 6.
STEP 3. Check the sunroof switch.
If the sunroof switch is defective, replace the sunroof switch. The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.
If the sunroof switch is not defective, go to Step 4.
STEP 4. Check the sunroof switch connector D-05 and sunroof motor assembly connector D-06 for damage.
If the sunroof switch connector D-05 and sunroof motor assembly connector D-06 are damaged, repair or replace them. Refer to Harness Connector Inspection. The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.
If the connectors are in good condition, go to Step 5.
STEP 5. Check the harness wire between sunroof switch connector D-05 and sunroof motor assembly connector D-06.
If the harness wire between sunroof switch connector D-05 and sunroof motor assembly connector D-06 is damaged, repair it.
The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.
STEP 6. Check the sunroof motor assembly connector D-06 and ETACS-ECU connector C-111 for damage.
If the sunroof motor assembly connector D-06 and ETACS-ECU connector C-111 are damaged, repair or replace them. Refer to Harness Connector Inspection. The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.
If the connectors are in good condition, go to Step 7.
STEP 7. Check the harness wires between sunroof motor assembly connector D-06 and ETACS-ECU connector C-111.
NOTE: After checking intermediate connector C-31 and joint connector C-78, check the wires. If intermediate connector C-31 and joint connector C-78 are damaged, repair or replace them. Refer to Harness Connector Inspection.
If the harness wires between sunroof motor assembly connector D-06 and ETACS-ECU connector C-111 are damaged, repair them.
The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.
If the harness wires are in good condition, replace the sunroof motor assembly or ETACS-ECU.
The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.